Master Lock No 2240

= Master Lock No. 2240 =

The No. 2240 is a pin-tumbler padlock made by Master Lock. The No. 2240 is a solid body copper padlock with an inner cylinder that uses five pin stacks and contains security pins.

Principles of operation

 * See also Pin-tumbler (Principles of Operation)

The No. 2240 cylinder is a pin-tumbler lock with five pin stacks and spooled security pins in various chambers. The No. 2240 can only be opened by rotating the plug clockwise.

Disassembly instructions
The No. 140 cannot be disassembled non-destructively; to disassemble it the lock must be sawed in half. The lock is nonfunctional once disassembled because the padlock body acts as the cylinder for the lock.

Vulnerabilities
The No. 2240 may be vulnerable to one or more of the following:


 * Lockpicking
 * Key bumping
 * Impressioning
 * Destructive entry